You can use similar tactics on your web site to increase product sales. For instance, if you have an article on how to choose digital cameras, create a small ad for digital cameras if you sell them and put it in the margin of the article. If you sell books, write short book reviews and put a link in each book review to a place on your site where the reader can buy the book you are reviewing.
Another tactic: run banner ads for your own own products on editorial pages on your web site. These ads will work like ads on the window of your favorite supermarket. They'll remind visitors of goodies you have in other parts of your web site.
Still another tactic: show your customers related products whenever they put something in their shopping cart. For instance if you're selling an ebook on how to give a good presentation, you might have something that tells customers about the cool PowerPoint templates they can also buy from you.
Supersize Your Sales Through Upselling and Cross-Selling